LOPT - FLYBACK EHT TRANSFORMER COMPARATION TABLE ORIGINAL ---> HR DIEMEN SPARE PART LIST 15

LOPT - FLYBACK EHT TRANSFORMER COMPARATION TABLE ORIGINAL ---> HR DIEMEN SPARE PART LIST 15

Here below a list of the original Flybacks LOPTS of many CRT TVs.

 Comparison list is organized with original code to the  HR DIEMEN corresponding Replacement part.

 

 These DC flybacks are found in every CRT computer monitor and are called the DST flybacks (diode-split transformers) because of the several high voltage diodes and secondaries inside. In addition to the high resistance resistor cascade (Bleeder) and focus/screen tuning potentiometers described above, these kinds may have an integrated high voltage filtering capacitor (few nanofarads at >=30 kV), or – optionally – a HV capacitor for dynamic focus.

The TV  DC flybacks are also diode-split (DST), however these are found in every modern CRT TV-set from mid-end 80s and onwards. These have just two screen-tuning potentiometers and no internal capacitors whatsoever !

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Original Reference	HR
F 0001 ME	HR 6123
F 0001 PE	HR 6123
F 0004 CE	HR 6376
F 0004 ME	HR 6376
F 0004 PE	HR 6376
F 0004 PE-D	HR 6376
F 0011 CE	HR 6377
F 0011 ME	HR 6377
F 0011 PE	HR 6377
F 0011 PE-D	HR 6377
F 0011 PE-M	HR 6377
F 0015 CE	HR 7626
F 0015 ME-H	HR 7626
F 0015 PE	HR 7626
F 0015 PE-M	HR 7626
F 0027 CE	HR 7675
F 0027 CE-M	HR 7675
F 0027 CEM	HR 7675
F 0027 PE	HR 7675
F 0027 PE-M	HR 7675
F 0027 PEM	HR 7675
F 0036 CE	HR 7635
F 0036 PE	HR 7635
F 0036 PE-M	HR 7635
F 0037 ME	HR 8406
F 0037 MEZZ	HR 8406
F 0045 PE	HR 8816
F 0045 PE-M	HR 8816
F 0063 CE	HR 7809
F 0063 PE	HR 7809
F 0063 PE-M	HR 7809
F 0069 CE	HR 7711
F 0069 PE	HR 7711
F 0069 PE-H	HR 7711
F 0069 PE-M	HR 7711
F 0111 BM	HR 19043
F 0115 PE	HR 7626
F 013 WJ-H	HR 8829
F 0148 PE-M	HR 8544
F 0149 PE	HR 8392
F 0149 PESA	HR 8392
F 015 WJ-H	HR 8810
F 0151 PE	HR 8544
F 0151 PE-SA	HR 8544
F 0156 PE-B	HR 8544
F 0210	HR 3606
F 0210 A	HR 3606
F 0213 PE	HR 8803
F 0213 PE-B	HR 8803
F 0220 A	HR 3606
F 0227	HR 3607
F 0234	HR 3608
F 0574 BM	HR 18017
F 0575 BM	HR 15008
F 0576 BM	HR 9830
F 1116	HR 6137
F 1117	HR 6137
F 1119	HR 7624
F 1143	HR 6143
F 1143 A	HR 6267
F 1162	HR 6482
F 1166	HR 6166
F 1178	HR 7689
F 1180	HR 7733
F 1182 CE	HR 6396
F 120 H 401	HR 7591
F 120 H 601	HR 7591
F 120 H 602	HR 7537
F 1204-1	HR 7474
F 1205 CE	HR 6396
F 12104-1	HR 7474
F 12105-1	HR 7607
F 1215 CE	HR 6123
F 1216 CE	HR 6123
F 1216 CE-S	HR 6123
F 1216 PE	HR 6123
F 1220 CE	HR 7050
F 1232 CE	HR 6364
F 1247 CE	HR 7348
F 1250 CE	HR 6131
F 1251 CE	HR 6363
F 1252 CE	HR 6395
F 1257 CE	HR 7348
F 1308 CE	HR 6376
F 1308 CE-D	HR 6376
F 1308 PE	HR 6376
F 1366 CE	HR 6610
F 1374 CE	HR 6377
F 1374 CE-D	HR 6377
F 1412 CE	HR 7753
F 1412 CEN1	HR 7753
F 1414 CE	HR 8050
F 1416 CE	HR 7812
F 1417 CE	HR 7847
F 1419 CE	HR 7812
F 1442 CE	HR 7756
F 1470 CE	HR 7847
F 1470 CE-A	HR 7847
F 1483 CE	HR 7761
F 1484 CE	HR 7756
F 1562 CE	HR 6384
F 1563 CE	HR 6266
F 1564 CE	HR 6266
F 1581 CE	HR 7846
F 1582 CE	HR 7760
F 1605 CE	HR 7760
F 1619 CE	HR 7626
F 1619 CE-M	HR 7626
F 1621 CE	HR 7812
F 1625 CE	HR 7790
F 1627 CE	HR 7851
F 1628 CE	HR 7851
F 1630 CE	HR 7759
F 1643 CE	HR 7807
F 1646 CE	HR 7855
F 1651 CE	HR 7861
F 1665 CE	HR 7752
F 1687 CE	HR 7773
F 1689 CE	HR 7748
F 1691 CE	HR 7763
F 1692 CE	HR 6131
F 1693 CE	HR 8310
F 1694 CE	HR 8310
F 1703 CE	HR 7864
F 171220	HR 8286
F 1717 CE	HR 7758
F 1751 CE	HR 7675
F 1754 CE	HR 8815
F 1768 BM	HR 6224
F 1768 CE	HR 6224
F 1780 CE	HR 7732
F 1783 BM	HR 6167
F 1783 CE	HR 6167
F 1786 BM	HR 6223
F 1790 CE	HR 7812
F 1802 CE	HR 8141
F 1826 CE	HR 8281
F 1838 CE	HR 7756
F 1839 CE	HR 8217
F 1840 CE	HR 8227
F 1856 CE	HR 7870
F 186 N	HR 42012
F 1881 CE	HR 8142
F 1890 CE	HR 8142
F 1901 CE	HR 8142
F 1923 CE	HR 8143
F 1952 CE	HR 8142
F 2000 BM	HR 6256
F 2000 BM1	HR 6256
F 2000 CE	HR 6256
F 2001 BM	HR 6253
F 2002 BM	HR 7521
F 2002 CE	HR 7521
F 2003 BM	HR 7531
F 2004 BM	HR 7521
F 2004 BMZZ	HR 7521
F 2005 BM	HR 7531
F 2005 CE	HR 8642
F 2006 BM	HR 7531
F 2006 BMZZ	HR 7531
F 2007 BM	HR 7521
F 2008 BM	HR 6475
F 2012 BM	HR 7521
F 2015 BM	HR 7497
F 2018 BM	HR 7497
F 2019 BM	HR 8570
F 2021 BM	HR 7653
F 2022 BM	HR 7558
F 2022 BMZZ	HR 7558
F 2023 BM	HR 7492
F 2023 BMZZ	HR 7492
F 2023 CE	HR 8286
F 2024 BM	HR 7559
F 2024 BMZZ	HR 7559
F 2025 BM	HR 7497
F 2027 BM	HR 7574
F 2028 BM	HR 8753
F 2029 BM	HR 7574
F 2030 BM	HR 7653
F 2031 BM	HR 7574
F 2032 BM	HR 7256
F 2033 BM	HR 7803
F 2034 BM	HR 7663
F 2035 BM	HR 7340
F 2036 BM	HR 7595
F 2038 BM	HR 7256
F 2039 BM	HR 8022
F 2040 BM	HR 7595
F 2041 BM	HR 6497
F 2042 BM	HR 7340
F 2045 BM	HR 8617
F 2046 BM	HR 8595
F 2047 BM	HR 7345
F 2048 BM	HR 8033
F 2049 BM	HR 8032
F 2050 BM	HR 6253
F 2052 BM	HR 8437
F 2053 BM	HR 8803
F 2053 CE	HR 8803
F 2059 BM	HR 8014
F 2065 BM	HR 8013
F 2069 BM	HR 8014
F 2070 BM	HR 6613
F 2071 BM	HR 6612
F 2072 BM	HR 8191
F 2073 BM	HR 8168
F 2074 BM	HR 8181
F 2075 BM	HR 6614
F 2076 BM	HR 8202
F 2078 BM	HR 6613
F 2082 BM	HR 8229
F 2083 BM	HR 8249
F 2087 BM	HR 8384
F 2089 BM	HR 8375
F 2092 BM	HR 8385
F 2092 CE	HR 8310
F 2092 CEZZ	HR 8310
F 2199 CE	HR 8310
F 5007 PA	HR 8129
F 640 Z 731	HR 9537
F 650 H 401	HR 7063
F 650 H 701	HR 7063
F 650 H 701/31	HR 7063
F 660 H 701	HR 7063
F 740 H 401	HR 7016
F 760 H 401	HR 7016
F 760 H 701	HR 7016
F 760 H 702	HR 7016
F 860 H 401	HR 7065
F 860 H 401 A	HR 7065
F 860 H 701	HR 7065
F 880 H 401	HR 7537
F 880 H 602	HR 7537
F 960 H 401	HR 7090
F 960 H 601	HR 7063
F 960 H 701	HR 6120
F 960 H 702	HR 6292
F 980 H 701	HR 6292
F 990	HR 8100
F 990 H 401	HR 6292
FA 01365	HR 46226
FA 014 WJ-H	HR 8830
FA 015 WJ	HR 8810
FA 1426	HR 7468
FA 2002	HR 7483
FA 2002 A	HR 7483
FA 2002 B	HR 7483
FA 2003	HR 7444
FA 2003 B	HR 7483
FA 2014	HR 7736
FA 2017	HR 8303
FA 2019	HR 7468
FA 2019 P	HR 7468
FA 2040	HR 7605
FA 2041	HR 7736
FA 2044	HR 7731
FA 2044 A	HR 7731
FA 2044 E	HR 7731
FA 2065	HR 8277
FA 2066	HR 46038
FAT 0048	HR 3602
FAT 0049	HR 3612
FAT 30201	HR 7468
FAT 900-1	HR 51/01
FAT 900-3	HR 51/01
FB 033	HR 8361
FB 033 A	HR 8361
FB 033 AB 13	HR 8361
FB 033 AB 15	HR 8361
FB 033 AF 15	HR 8361
FB 059	HR 7183
FB 1	HR 2279 T18
FB 1047	HR 42092
FB 1053	HR 6215
FB 1053 A	HR 6215
FB 1061	HR 46077
FB 1061 A	HR 46077
FB 1143	HR 6143
FB 125	HR 7472
FB 132	HR 7472
FB 185 C	HR 46013
FB 2023	HR 42028
FB 2030	HR 42030
FB 2058	HR 7651
FB 2059	HR 46044
FB 2059 A	HR 46044
FB 2059 E	HR 46044
FB 2063	HR 42069
FB 2068	HR 42077
FB 3005	HR 6382
FB 3056	HR 46023
FB 3064	HR 46023
FB 3082	HR 8781
FB 3084	HR 46026
FB 4 B	HR 42080
FBA 507	HR 46093
FBM 002	HR 42057
FBM 003	HR 2290 T1
FBT 001	HR 7628
FBT 003	HR 42051
FBT 007	HR 46107
FBT 0189	HR 6241
FBT 042 M	HR 46056
FBT 044042-000	HR 2287 T28
FBT 059	HR 7183
FBT 079	HR 6190
FBT 099	HR 6281
FBT 1053	HR 6215
FBT 1061 A	HR 46077
FBT 14 N	HR 8643
FBT 189	HR 6241
FBT 23 F 010 S 1	HR 7776
FBT 23 F 0101 S 1	HR 7776
FBT 23 F 101 S 1	HR 7776
FBT 240	HR 6281
FBT 2990	HR 8251
FBT 2990 A	HR 8251
FBT 3380	HR 8296
FBT 402	HR 7149
FBT 412	HR 7150
FBT 520	HR 6221
FBT 7401 C	HR 8313
FBT 820	HR 7148
FBT 970	HR 6222
FBTF 011 S 1	HR 7776
FC 1401	HR 7452
FC 1404 B	HR 7728
FC 1406	HR 7460
FC 1426	HR 7455
FC 1426 P	HR 7455
FC 1431	HR 7834
FC 1431 D	HR 7834
FC 1432	HR 7742
FC 1434	HR 7729
FC 1439	HR 7462
FC 1445	HR 7608
FC 1452	HR 7472
FC 31 A 04	HR 8692
FCA 047	HR 7881
FCA 089	HR 8087
FCA 889	HR 8087
FCC 064	HR 8781
FCC 096	HR 8184
FCC 120	HR 8757
FCC 1415 AL	HR 7254
FCC 1415 DL	HR 7248
FCC 1415 GL	HR 8083
FCC 1415 GN	HR 8083
FCC 1415 IL	HR 7254
FCC 1415 JL	HR 7248
FCC 1415 OL	HR 8082
FCC 1415 SL	HR 7863
FCC 1415 XL	HR 8090
FCC 1445 CL	HR 7719
FCC 1514 AL	HR 7254
FCC 2015 AL	HR 7083
FCC 2015 BE	HR 7188
FCC 2015 CE	HR 7197
FCC 2015 DE	HR 8045
FCC 2015 FL	HR 7787
FCC 2015 GL	HR 8085
FCC 2015 JL	HR 7216
FCC 2015 LL	HR 8081
FCC 2215 AE	HR 7873
FCF 98020 A	HR 7455
FCG 1445 CL	HR 7719
FCG 1445 EL	HR 7719
FCG 2011 L 03	HR 7938
FCG 2012 L 06	HR 7853
FCG 2045 AL	HR 7938
FCG 2045 BL	HR 7716
FCG 2045 CL	HR 7716
FCG 2245 BL	HR 7716
FCG 2245 CL	HR 7716
FCK 09 A 002	HR 8501
FCK 09 A 002 (S)	HR 8501
FCK 09 A 002 S	HR 8501
FCK 14 A 006	HR 7998
FCK 14 A 009	HR 7728
FCK 14 A 009 D	HR 7728
FCK 14 A 019	HR 7834
FCK 14 A 019 A	HR 7834
FCK 14 A 022	HR 8805
FCK 14 A 028	HR 7737
FCK 14 A 028 A	HR 7737
FCK 14 A 033	HR 7843
FCK 14 B 002	HR 7687
FCK 14 B 013	HR 8349
FCK 14 B 025	HR 7782
FCK 14 B 025 A	HR 8823
FCK 14 B 040	HR 7791
FCK 14 B 045	HR 8766
FCK 14 B 045 A	HR 8766
FCK 14 B 2	HR 7687
FCK 14 B 2 A	HR 7687
FCK 1412 E 01	HR 46043
FCK 1412 E 07	HR 7728
FCK 1415 AL	HR 7603
FCK 1415 EL	HR 7603
FCK 1415 JL	HR 7670
FCK 1421 E 01	HR 46043
FCK 1464 D	HR 7728
FCK 1464 D 1	HR 7728
FCK 1464 D-1	HR 7728
FCK 1482	HR 7782
FCK 20 B 003	HR 7783
FCK 21 B 003	HR 8492
FCK 21 B 003 S	HR 8492
FCM 1245 RL	HR 42046
FCM 14 A 003	HR 46027
FCM 14 A 004	HR 7469
FCM 14 A 007	HR 8169
FCM 14 A 007 B	HR 8169
FCM 14 A 025	HR 7794
FCM 14 A 032	HR 7998
FCM 14 A 033	HR 7843
FCM 14 B 007	HR 8169
FCM 14 B 007 A	HR 8169
FCM 14 B 007 B	HR 8169
FCM 14 B 007 BL	HR 8169
FCM 14 B 009	HR 8087
FCM 1411 L 01	HR 7618
FCM 1415 AL	HR 7469
FCM 1415 CL	HR 7879
FCM 1812 E 01	HR 7731
FCM 20 A 001	HR 7738
FCM 20 A 005	HR 7477
FCM 20 A 010	HR 7738
FCM 20 A 015	HR 7471
FCM 20 A 016	HR 7443
FCM 20 A 021	HR 7731
FCM 20 A 023	HR 7617
FCM 20 A 025	HR 7795
FCM 20 A 029	HR 7999
FCM 20 B 003	HR 8094
FCM 20 B 007	HR 8773
FCM 20 B 010	HR 7612
FCM 20 B 021	HR 7840
FCM 20 B 022	HR 7432
FCM 20 B 025	HR 7830
FCM 20 B 027	HR 7438
FCM 20 B 031	HR 7473
FCM 20 B 031 A	HR 7473
FCM 20 B 034	HR 7691
FCM 20 B 034 A	HR 7691
FCM 20 B 042	HR 8668
FCM 20 B 043	HR 7779
FCM 20 B 057	HR 8564
FCM 2012 E 13	HR 7840
FCM 2012 E 16	HR 8138
FCM 2012 E 16 A	HR 8138
FCM 2012 L 02	HR 7958
FCM 2014 FL	HR 7616
FCM 2015	HR 7477
FCM 2015 AL	HR 7477
FCM 2015 CL	HR 7879
FCM 2015 HE	HR 7929
FCM 2015 KE	HR 7731
FCM 2015 KF	HR 7466
FCM 2015 ML	HR 7605
FCM 2015 MLP	HR 7605
FCM 21 A 003	HR 7443
FCM 21 A 003 A	HR 7443
FCM 21 A 004	HR 7491
FCO 14 A 002	HR 46033
FCO 14 A 002 A	HR 46033
FCO 14 A 003	HR 46027
FCO 14 A 003 A	HR 46027
FCO 14 A 003 L	HR 46027
FCO 14 A 010	HR 46048
FCO 14 A 010 A	HR 46048
FCO 14 A 017	HR 7708
FCO 14 A 019	HR 46027
FCO 14 A 028	HR 8248
FCO 14 A 030	HR 7708
FCO 14 A 030 C	HR 7708
FCO 14 A 030 E	HR 7708
FCO 14 A 031	HR 46072
FCO 14 A 037	HR 8219
FCO 14 A 042	HR 46089
FCO 14 A 042 C	HR 46089
FCO 14 R 001	HR 7249
FCO 1412 E 03	HR 46006
FCO 1412 E 08	HR 7252
FCO 1412 E 10	HR 7255
FCO 1412 L 02	HR 8608
FCO 1414 E 08	HR 7252
FCO 2030 BE	HR 7246
FCR 25 A 003	HR 7623
FCR 25 A 003 R	HR 7623
FCR 25 A 005	HR 7680
FCR 25 A 005 R	HR 7680
FCR 25 A 006	HR 7955
FCR 25 A 006 R	HR 7955
FCR 25 A 007	HR 7959
FCR 25 A 007 R	HR 7959
FCR 25 A 009	HR 8825
FCR 25 A 009 R	HR 8825
FCR 25 A 013	HR 7992
FCR 25 A 013 R	HR 7992
FCR 2615 AL	HR 7677
FCR 28 A 002	HR 7610
FCR 29 A 001	HR 8506
FCR 29 A 002	HR 7987
FCR 29 A 006	HR 7982
FCR 29 A 006 A	HR 7982
FCR 29 A 014	HR 7614
FCR 29 A 014 R	HR 7614
FCS 230 A 1	HR 46001
FCV 1010 E 02	HR 7273
FCV 14 C 001	HR 7520
FCV 14 C 001 A	HR 7520
FCV 14 C 003	HR 7560
FCV 1410	HR 8239
FCV 1410 E 03	HR 7127
FCV 1410 E 06	HR 8239
FCV 1410 E 07	HR 7336
FCV 1410 E 12	HR 7261
FCV 1410 E 12 A	HR 7261
FCV 1410 E 18	HR 8057
FCV 1411	HR 8239
FCV 1411 E 06	HR 8239
FCV 1412 E 15	HR 8095
FCV 1412 E 15/2	HR 8095
FCV 1412 E 17	HR 7029
FCV 1422 E 03	HR 8080
FCV 1422 L 01	HR 7094
FCV 15 B 001	HR 46058
FCV 1510 E 01	HR 7264
FCV 1610 E 02	HR 8067
FCV 20 A 001	HR 7898
FCV 20 A 002	HR 7577
FCV 20 A 009	HR 7503
FCV 20 A 014	HR 7266
FCV 20 C 001	HR 7384
FCV 20 C 001 R	HR 7384
FCV 20 C 002	HR 8545
FCV 20 C 002 P	HR 8545
FCV 20 C 002 R	HR 8545
FCV 20 C 002 RC	HR 8545
FCV 2010	HR 7357
FCV 2010 E 02	HR 7357
FCV 2010 E 03	HR 8784
FCV 2010 E 04	HR 8092
FCV 2010 E 06	HR 7261
FCV 2010 E 07	HR 7535
FCV 2010 E 10	HR 8459
FCV 2011	HR 7357
FCV 2012 B 10	HR 7358
FCV 2012 E 10	HR 7358
FCV 2012 E 11	HR 7355
FCV 21 A 001	HR 8488
FCV 21 A 001 A	HR 8488
FCV 21 A 002	HR 7128
FCV 21 A 006	HR 8206
FCV 21 A 006 R	HR 8206
FCV 50 B 01	HR 7094
FCV 50 B 02	HR 7247
FCZ 29 A 002	HR 8854
FCZ 29 A 006	HR 8856
FCZ 29 A 006 A	HR 8856
FCZ 29 A 006 A (S)	HR 8856
FCZ 29 A 006 R	HR 8856
FCZ 29 A 006 R (S)	HR 8856
FCZ 29 A 014	HR 8678
FCZ 29 A 014 F	HR 8678
FCZ 29 A 014 S	HR 8678
FD 00 A 03	HR 42065
FD 0002	HR 7624
FD 0003	HR 7624
FD 0003 A	HR 7624
FD 0039	HR 7875
FD 0067	HR 8611
FD 0094	HR 7874
FD 0113	HR 8364
FD 0125	HR 7713
FD 0125 A	HR 7713
FD 0130	HR 7961
FD 0132	HR 7715
FD 0155	HR 7961
FD 0161	HR 7624
FD 0181	HR 8347
FD 0187	HR 7740
FD 0195	HR 8693
FD 0199	HR 7627
FD 02 A 51	HR 42062
FD 02 A 52	HR 42071
FD 0205	HR 7712
FD 0206	HR 8360
FD 03	HR 7624
FD 113	HR 8364
FD 125	HR 7713
FD 125 A	HR 7713
FD 125 D	HR 7713
FD 130	HR 7961
FD 132	HR 7715
FD 155	HR 7961
FD 161	HR 7624
FD 181	HR 8347
FD 187	HR 7740
FD 19061	HR 7217
FD 195	HR 8693
FD 199	HR 7627
FD 2	HR 7624
FD 205	HR 7712
FD 206	HR 8360
FD 206 AB	HR 8360
FD 206 DC	HR 8360
FD 3	HR 7624
FD 3 A	HR 7624
FD 39	HR 7875
FD 67	HR 8611
FD 94	HR 7874
FDA 00 A 03	HR 42046
FDA 0001	HR 8528
FDA 001-117 A	HR 42003
FDA 001-117 AA	HR 42004
FDA 004-1230	HR 46001
FDA 004-1230-A	HR 46001
FDA 006	HR 8458
FDA 006 N	HR 8458
FDA 013	HR 7869
FDA 013 HC	HR 7869
FDA 014	HR 7867
FDA 014 HC	HR 7867
FDA 0148 C	HR 7867
FDA 017	HR 42043
FDA 017-111 C	HR 42043
FDA 019	HR 42012
FDA 019 B	HR 42012
FDA 019 C	HR 42013
FDA 019-1170	HR 42012
FDA 019-1170 B	HR 42012
FDA 019-1170 C	HR 42013
FDA 024	HR 42082
FDA 024-111 A	HR 42082
FDA 06	HR 8458
FDA 06 N	HR 8458
FDA 075	HR 42070
FDA 075-1320	HR 42070
FDA 075-1320 A	HR 42070
FDA 087	HR 42051
FDA 087-303123-01	HR 42051
FDA 507	HR 46093
FDA 6	HR 8458
FDB 0003	HR 8365
FDB 01	HR 7712
FDB 03	HR 8365
FDB 05	HR 7712
FDB 1	HR 7712
FDB 3	HR 8365
FDB 5	HR 7712
FDC 014	HR 42028
FDC 014-111 A	HR 42028
FDC 018	HR 42030
FDC 018-1110	HR 42030
FDC 039	HR 46044
FDC 056	HR 42069
FDC 056-111 A	HR 42069
FDC 061	HR 42077
FDC 061-111 A	HR 42077
FDC 063	HR 42076
FDC 063-1170	HR 42076
FDR 11 B 004	HR 42103
FDR 118-004	HR 42103
FE 2004	HR 8508
FE 2024	HR 7188
FE 7547 T	HR 46166
FEA 004	HR 46001
FEA 004 A	HR 46001
FEA 004-1230	HR 46001
FEA 004-1230-A	HR 46001
FEA 013	HR 46002
FEA 013-1090	HR 46002
FEA 026	HR 46044
FEA 026-1350	HR 46044
FEA 027	HR 46196
FEA 033	HR 7692
FEA 039	HR 46043
FEA 039-1370	HR 46043
FEA 047	HR 46005
FEA 047 B	HR 46005
FEA 047-1380	HR 46005
FEA 048	HR 46004
FEA 048-1410	HR 46004
FEA 056	HR 46017
FEA 056 A	HR 46017
FEA 056-1370	HR 46017
FEA 059	HR 46024
FEA 059-1370	HR 46024
FEA 063	HR 7686
FEA 063 B	HR 7686
FEA 065	HR 46056
FEA 065 A	HR 46056
FEA 065-141 A	HR 46056
FEA 065-141 AA	HR 46056
FEA 066	HR 46061
FEA 071	HR 46089
FEA 075	HR 7628
FEA 077	HR 46003
FEA 077-1380	HR 46003
FEA 089	HR 7842
FEA 128	HR 46081
FEA 147	HR 46137
FEA 181	HR 7775
FEA 181 A	HR 7775
FEA 185	HR 46089
FEA 185 A	HR 46089
FEA 188	HR 7495
FEA 188-420025-01	HR 7495
FEA 207	HR 46196
FEA 210	HR 7658
FEA 210 A	HR 7658
FEA 223	HR 7744
FEA 229	HR 46139
FEA 237	HR 7775
FEA 237 A	HR 7775
FEA 241	HR 7664
FEA 258	HR 46088
FEA 261	HR 46166
FEA 284	HR 46143
FEA 287	HR 46122
FEA 288	HR 7744
FEA 306	HR 46088
FEA 306 A	HR 46088
FEA 340	HR 46186
FEA 340 B	HR 46186
FEA 364	HR 46189
FEA 374	HR 46099
FEA 374 C	HR 46099
FEA 410	HR 7972
FEA 419	HR 46188
FEA 426	HR 46156
FEA 426-1510	HR 46156
FEA 448	HR 8189
FEA 452	HR 46005
FEA 454	HR 46160
FEA 469	HR 46230
FEA 477	HR 46222
FEA 480	HR 46115
FEA 488	HR 8189
FEA 502	HR 46167
FEA 503	HR 46132
FEA 507	HR 46093
FEA 515	HR 46124
FEA 540	HR 46220
FEA 540 A	HR 46220
FEA 545	HR 46220
FEA 565	HR 46130
FEA 583	HR 46132
FEA 627	HR 46166
FEA 634	HR 7744
FEA 638 A	HR 46167
FEA 641	HR 46133
FEA 645	HR 46123
FEA 653	HR 46184
FEA 658	HR 46231
FEA 662	HR 46155
FEA 663	HR 46161
FEA 663 A	HR 46161
FEA 685	HR 46129
FEA 688	HR 46184
FEA 689	HR 46230
FEA 690	HR 46232
FEA 690 A	HR 46232
FEA 708	HR 46121
FEA 718	HR 46188
FEA 751	HR 46207
FEA 753	HR 46117
FEA 755	HR 46117
FEA 780	HR 46221
FEA 780 B	HR 46221
FEA 813	HR 46002
FEA 830	HR 46153
FEA 831	HR 46203
FEA 848	HR 46125
FEA 862	HR 46125
FEA 885	HR 46229
FEA 927	HR 7744
FEA 972	HR 46176
FEC 006	HR 46023
FEC 006-1150	HR 46023
FEC 009	HR 46026
FEC 009-1230	HR 46026
FEC 022	HR 46039
FEC 022-1230	HR 46039
FEC 033	HR 46090
FEC 033 A	HR 46090
FFA 64012 L	HR 8681
FFA 76014 D	HR 46154
FFA 76014 L	HR 46154
FFA 76014 U	HR 46154
FFA 82012 H	HR 46167
FFA 82025 H	HR 46167
FFA 83012 D	HR 7826
FFA 83013 D	HR 7826
FFA 86012 A	HR 46143
FFA 86012 D	HR 46143
FFA 86012 D 1	HR 46143
FFA 86012 D 2	HR 46143
FFA 86012 H	HR 46143
FFA 86012 L	HR 46143
FFA 91001 M	HR 7710
FFA 93012 L	HR 8763
FFA 93016 L	HR 8763
FFA 93021 L	HR 7970
FFA 93034 L	HR 8307
FFA 95001 D	HR 46145
FFA 95001 H	HR 46145
FFA 95002 D	HR 46098
FFA 98001 D	HR 46145
FFA 98001 H	HR 46145
FFA 98001 M	HR 46145
FGC 2045 BL	HR 7716
FK 0164	HRT 505
FK 1009	HR 7728
FKD 14 A 001	HR 46117
FKD 15 A 001	HR 46117
FKD 15 B 002	HR 46199
FKD 15 D 002	HR 46192
FKG 15 A 001	HR 46117
FKG 15 A 006	HR 46153
FKH 17 A 001	HR 46179
FKI 17 A 001	HR 46168
FKI 17 A 002	HR 46169
FKY 17 A 001	HR 46168
FKY 17 A 002	HR 46169
FL 12104-1	HR 7474
FL 2700	HR 7708
FL 2705	HR 7252
FL 2713	HR 7255
FL 2727	HR 46089
FL 2732	HR 8369
FL 2732 A	HR 8369
FL 2732 B	HR 8369
FLB 505	HR 7939
FLB 505-425765	HR 7939
FM 0017	HR 8453
FM 0019	HR 6212
FM 0023	HR 8086
FM 0082	HR 2082
FM 0202	HR 1100
FM 0205	HR 2143
FM 0206	HR 1100
FM 0245	HR 2064
FM 0500	HR 5806
FM 0500 A	HR 5806
FM 0500 B	HR 5806
FM 0502	HR 5804
FM 0502 B	HR 5804
FM 0503	HR 5807
FM 0503 A	HR 5807
FM 0503 B	HR 5807
FM 0504	HR 5805
FM 0504 C	HR 5805
FM 0510	HR 5803
FM 0513	HR 5802
FM 0518	HR 5802
FM 0519	HR 5801
FM 0523	HR 5808
FM 0524	HR 5809
FM 0530	HR 5802
FM 0533	HR 5800
FM 0595	HR 46058
FM 0619	HR 46058
FM 0623	HR 46114
FM 0638	HR 46163
FM 17	HR 8453
FM 19	HR 6212
FM 202	HR 1100
FM 23	HR 8086
FM 245	HR 2064
FM 245 A 407	HR 2064
FM 2812	HR 7614
FM 500 A	HR 5806
FM 500 B	HR 5806
FM 502	HR 5804
FM 502 A	HR 5804
FM 502 B	HR 5804
FM 503	HR 5807
FM 503 A	HR 5807
FM 504	HR 5805
FM 504 B	HR 5805
FM 504 C	HR 5805
FM 510	HR 5803
FM 513	HR 5802
FM 519	HR 5801
FM 530	HR 5802
FM 533	HR 5800
FMA 0002	HR 8402
FMA 01	HR 8689
FMC 1245 RL	HR 42046
FMC 20 B 022	HR 7432
FMD 1235 AL	HR 42037
FMD 1235 BL	HR 42037
FMD 1245 DL	HR 42046
FMD 1245 RL	HR 42046
FMG 1235 BL	HR 42017
FMG 1235 CL	HR 42068
FMG 1235 FL	HR 42018
FMG 1245 AL	HR 42066
FMG 1435 CE	HR 42067
FMH 1235 DE	HR 2287 T32
FMH 1245 AL	HR 42060
FMH 1245 IL	HR 42071
FMH 1445 PL	HR 2287 T21
FMMPC 11-2001 A	HR 46127
FMMPC 11-2001 D	HR 46148
FMMPC 11-2001 E	HR 46127
FMMPC 11-2001 G	HR 46135
FMMPC 11-2001 J	HR 46148
FMMPC 21-2002 F	HR 46191
FMMPC 51 M 1003 G	HR 46176
FMMPC 51-1003 D	HR 46148
FMMTC 61-1012 B	HR 46159
FMMTC 61-1017 A	HR 46187
FN 1047	HR 46167
FN 1407	HR 46167
FN 1419	HR 7695
FN 1419 A	HR 7695
FN 1528	HR 46117
FN 1530	HR 46213
FN 1534	HR 46117
FQB 17 A 001	HR 46203
FQB 17 A 001 M	HR 46203
FQI 20 B 001	HR 8765
FQI 21 B 002	HR 8820
FR 0027	HR 2272 R
FR 0029	HR 3615
FR 0057	HR 5126
FR 0066	HR 5126
FR 0075	HR 3615
FR 0082	HR 2082
FR 027	HR 2272 R
FR 029	HR 3615
FR 057	HR 5126
FS 230-009	HR 46001
FSA 14 A 003	HR 46091
FSA 15 A 002	HR 46183
FSA 15 A 003	HR 46183
FSA 15002	HR 46183
FSA 17013 M	HR 7493
FSA 24006 S	HR 7770
FSA 24007 L	HR 8767
FSA 24007 M	HR 8767
FSA 24008 S	HR 7770
FSA 25002	HR 7725
FSA 25002 S	HR 7725
FSA 25023	HR 8514
FSA 25023 S	HR 8514
FSA 25027 S	HR 7912
FSA 26012 M	HR 7770
FSA 26013 M	HR 7935
FSA 28013 M	HR 7880
FSA 28014 M	HR 8301
FSA 28023 M	HR 7940
FSA 32014	HR 7522
FSA 32014 M	HR 7522
FSA 36012 M	HR 7880
FSA 36013 M	HR 8480
FSA 37012 M	HR 8480
FSA 38019 S	HR 8491
FSA 38026 S	HR 8491
FSA 39012 S	HR 8300
FSA 42013 L	HR 8681
FSJ 21 B 001	HR 8512
FSJ 21 C 001	HR 8185
FSM 25 A 001	HR 8679
FSM 27 A 001	HR 8511
FSM 28 A 001	HR 8210
FSN 14 A 015	HR 8189
FSN 14 A 024	HR 46124
FSN 14 A 028	HR 46171
FSN 14 A 028 N	HR 46171
FSN 14 A 028 S	HR 46171
FSN 14 A 029	HR 46123
FSN 14 A 029 F	HR 46123
FSN 14 A 029 S	HR 46123
FSN 14 B 027	HR 46125
FSN 14 B 027 N	HR 46125
FSN 14028 M	HR 46171
FSN 14028 N	HR 46171
FSN 15 A 008	HR 46122
FSN 15 A 008 F	HR 46122
FSN 15 A 008 S	HR 46122
FSN 15 B 004	HR 46122
FSN 15 B 022	HR 46129
FSN 15 B 022 N	HR 46129
FSN 15 B 032	HR 46215
FSN 15 B 032 N	HR 46215
FSN 15 B 045	HR 46121
FSN 15 B 045 N	HR 46121
FSR 28 A 005	HR 7386
FSR 28 A 005 S	HR 7386
FST 1125 F 012/64	HR 6012
FST 1125 F 120/64	HR 6059
FST 1125 F 640/64	HR 6076
FST 1125-110	HR 6076
FSV 14 A 001	HR 8207
FSV 14 A 001 S	HR 8207
FSV 14 A 004	HR 8491
FSV 14 A 004 H	HR 8628
FSV 14 A 004 H (S)	HR 8628
FSV 14 A 004 S	HR 8491
FSV 14001	HR 8207
FSV 20 A 001	HR 7898
FSV 20 A 001 A	HR 7898
FSV 20 A 001 D	HR 7898
FSV 20 A 001 S	HR 7898
FSV 20 B 001	HR 8481
FSV 20 B 001 A	HR 8170
FSV 20 B 001 AS	HR 8170
FSV 20 B 001 S	HR 8170
FSV 20 B 013	HR 8438
FSV 20 B 018	HR 8769
FSV 20 B 018 C	HR 8769
FSV 20 B 018 V	HR 8769
FSV 20 C 012	HR 8545
FSV 20 C 012 A	HR 8545
FSV 21 B 005	HR 8779
FSV 21 B 005 (S)	HR 8779
FSV 21 B 005 A	HR 8779
FSV 21 B 005 A (S)	HR 8779
FSV 21 B 005 S	HR 8779
FSW 17 A 002	HR 46216
FSY 17 A 001	HR 46152
FT 0002	HR 46154
FT 1004 B	HR 42056
FTB 7401 C	HR 8606
FTH 29 A 001	HR 7968
FTH 29 A 001 H	HR 7968
FTH 29 A 001 S	HR 7968
FTH 29 A 002	HR 7974
FTH 29 A 003	HR 8614
FTH 29 A 003 S	HR 8614
FTH 29 A 013	HR 8494
FTH 29 A 013 A	HR 8494
FTH 29 A 013 G	HR 8494
FTH 29 A 013 S	HR 8494
FTI 14 A 005	HR 7933
FTI 14 A 005 A	HR 7933
FTK 14 A 004	HR 7852
FTK 14 A 004 P	HR 7852
FTK 14 R 005	HR 8622
FTK 14 R 005 C	HR 8622
FTK 14004 P	HR 7852
FTK 20 R 002	HR 8093
FTK 20 R 004	HR 8616
FTK 20 R 004 C	HR 8616
FTK 20 R 008	HR 8616
FTK 20 R 008 C	HR 8616
FTK 21 B 003	HR 8776
FTK 21 B 003 A	HR 8492
FTK 21 B 003 AS	HR 8492
FTK 21 B 003 S	HR 8776
FTMPC 11 T 6238 L	HR 8164
FTMPC 31 T 6005 S	HR 8811
FTMPN 51 T 6012 C	HR 8853
FTMPN 51 T 6012 D	HR 8838
FTMPN 51 T 6012 J	HR 8645
FTMPNG 1-604	HR 8656
FTN 21 A 001	HR 7351
FTO 14 A 010	HR 46048
FTO 14 A 041	HR 7937
FTQ 14 A 003	HR 7786
FTQ 14 A 003 A	HR 7786
FTQ 17 A 003 A	HR 7786
FTR 29 A 002	HR 8214
FTR 29 A 003	HR 8393
FTS 14 A 003	HR 46085
FTS 14 A 003 D	HR 46084
FTS 14 A 005	HR 46054
FTS 14 A 007	HR 46054
FTS 14 A 010	HR 46084
FTS 14 A 010 A	HR 46084
FTS 14 A 013	HR 46053
FTS 14 A 013 A	HR 46053
FTS 777 D	HR 9365
FTSPN 11 E 8001 A	HR 7896
FTSPN 13 T 8005 C	HR 8300
FTSPN 13 T 8005 E	HR 8123
FTX 14 A 005	HR 8247
FTX 14 A 013	HR 46183
FTX 14 A 015	HR 46089
FTZ 17 A 007	HR 46054
FTZ 17 A 007 AX	HR 46054
FUA 17 A 010	HR 46221
FUH 29 A 001	HR 8212
FUH 29 A 001 B	HR 8780
FUH 29 A 001 BS	HR 8780
FUH 29 A 001 S	HR 8212
FUH 29 A 002	HR 8764
FUH 29 A 002 S	HR 8764
FUH 29 A 003	HR 8477
FUH 29 A 003 S	HR 8477
FUH 29 A 004	HR 8379
FUH 29 A 004 S	HR 8379
FUH 29 C 001	HR 8852
FUH 29 C 001 S	HR 8852
FUH 34 A 001	HR 8585
FUH 34 A 001 B	HR 8585
FUH 34 A 001 S	HR 8585
FUJ 29 C 005	HR 8787
FUJ 29 C 005 F	HR 8787
FUJ 29 C 007	HR 8844
FUJ 29 C 007 S	HR 8844
FUR 3658	HR 46203
FUV 14 A 001	HR 7583
FUV 14 A 003	HR 7128
FUV 20 A 002	HR 7577
FUV 20 A 002 B	HR 7577
FUV 20 A 006	HR 8036
FUV 20 A 006 A	HR 8036
FUV 20 A 009	HR 7503
FUV 20 C 001	HR 8036
FUY 20 A 001	HR 7950
FUY 20 C 001	HR 8554
FUY 20 C 001 R	HR 8554
FUY 20 C 011	HR 7656
FVC 2012 E 10	HR 7358
FWK 350	HRT 301
FXB 0012	HR 8440
F2-01	HR 2053

Line transformers generate the necessary deflection pulse and other many key voltages and the  high voltage for anode of the picture tube in tube televisions and computer monitors. Usually this is around 30 kV for a color device, but the current is  with approx. 0.5 to 4 mA.

The line transformer or horizontal output transformer (English: flyback transformer or line output transformer) is part of a television / monitor with picture tube. It is used to supply the line deflection coil of the deflection system and at the same time usually also to generate the high voltage of 20 to 30 kV required for the operation of the picture tube and other voltages necessary for the operation of the device.

Line transformers work with the line frequency, with European TV sets with 15.625 kHz. Line transformers of 100 Hz televisions work at twice the frequency, i.e. at 31.25 kHz. In monitors, the line transformer is operated at different frequencies, which depend on the resolution of the image sent by the computer. For example, the line frequency of a monitor with a resolution of 1024 × 768 pixels and 85 Hz vertical frequency is approximately 68.7 kHz. With these frequencies, the line output stage switches a switching tube or today a switching transistor, which are used to control the line transformer.
The whistling noise of some older monitors and most older, conventional TV sets arises from the fact that mainly the line transformer, but also other components such as coils and capacitors, are mechanically excited to vibrate by the occurring magnetic and electrostatic forces. Whistling has a frequency of 15.625 kHz due to the European television standard. TVs with 100 Hz technology and most high-resolution computer monitors whistle outside the listening area........

Line transformers are potted with resin and have a ferrite core and are therefore of course only suitable for high frequencies in the kHz range. Newer types, so-called diode split transformers, contain many individual diodes between the windings and thus supply a rectified high voltage (pulsating DC voltage). Older models made of black and white devices have an external cascade, the direct (high-frequency) output voltage is then only about 8 kV, but a little more current is available with such AC line transformers. Line transformers require an electronic control circuit which provides a square wave signal in the range of approx. 15 kHz.

Diode split transformer with permanently cast diodes and DC output The advantage of line transformers: They are easy and inexpensive (or free) and can be obtained in large numbers at radio / TV shops and in computer shops where devices are disposed of. Especially nowadays, in which tube monitors have to make room for flat screens, many old monitors and TVs are disposed of.

Removal and wiring of a line transformer:

Important when removing the line transformer from the TV or monitor: First discharge the picture tube, then remove the high-voltage connection, and draw out the pin assignment of the line transformer before unsoldering. Two connections are particularly important: supply supply (approx. 150V from the power supply unit) and connection that goes to the collector of the horizontal output transistor or on very older types to a tube or thyristor final stage.


The thick, well-insulated, red cable is the high-voltage output (approx. 30kV), while the somewhat thinner, black cable carries the focus voltage, which is only around 6kV. Finally, the orange cable brings the grid 2 voltage, which is only a few hundred volts. Television and monitor flyback transformer pinout have some common designed except that the monitor flyback have a internal capacitor built in. The internal capacitor value have around 2.7 nanofarad to 4.5 nanofarad to improve the picture quality especially when the monitor which can go for a higher resolution compare to Tv. If without the internal capacitor in the monitor flyback the display will curve or slightly out of shape especially at both the right and left hand side of the picture and may present other imperfections not admitted for monitors. It acts as a filter. Internally they may have a high vealue resitor (600 to 900 mega ohm) in parallel to HV output. This to adapt the ouput impedance of the LOPT to the CRT Anode.

Mostly tv and monitor flyback transformers have about ten pins at the bottom of the flyback. Each of the pin have a purpose or function as part of a complete circuit. The common pins that you can find in monitor flyback are: B+ pin, Horizontal collector pulse, ABL (automatic blanking limiter), GROUND, G1, AFC (automatic frequency control), VCC, HEATER (to filament) and X-RAY protection.

The B+ and horizontal collector pulse pin forms one winding which we call it as flyback primary winding. It can  only can be test by using a flyback meter such as the  Lopt tester flyback transformer pinoutor sencore LC102 and LC103C.

Note that some monitors and TV design may have a separate HV and deflections circuits
.
Normal meters can't check this kind of fault. This is the most important winding compares to others and it can easily developed a short circuit when B+ voltage line or Horizontal output transistor (HOT) shorted. Sometimes a shorted internal capacitor in the flyback transformer may cause the primary winding to burn internally and the flyback became bulge and poured out the epoxy.

Other pins are the ground, G1, and AFC winding. AFC stand for automatic frequency control and it send signal (pulse) from the flyback transformer to the horizontal oscillator ic to lock or synchronize the frequency of the monitor. If this AFC line fails the picture will shift either to the far left or far right. There is no way that you can adjust the picture to the center even with the internal adjustment in the mainboard. The purpose of G1 voltage is to pull the electron generated from the cathode (after the heater or filament heat up) and passed it to G2 which is the screen voltage.

G1 normally is a negative voltage or positive from few volts to 32 volts in some most ancient designs . Most tv picture tube do not use G1 voltage. If the G1 voltage is missing or zero voltage to the picture tube the monitor display will becomes very bright with retrace lines (diagonal lines or flyback lines) across the screen and sometimes the monitor will goes into shutdown mode.
ABL stand for automatic beam limiter- I refer it as a limiter further circuit. Why? because whenever there is a contrast or bright problem i will search for this pin and begin to trace from there. Normally a resistor increased in resistance and a shorted ceramic capacitor caused the display to become dim and you may think it might be the fault of a bad CRT.

Heater or filament pin nowadays hardly found in monitor flyback because the crt heater voltage now is derived directly from the switch mode power supply. However heater pin is still can be found in television flyback transformer. If the anode voltage is too high (more than 30 kilovolt), the x-ray protect pin will send a signal to horizontal oscillator ic in order to disable the horizontal drive waveform THIS FOR SAFETY REASONS.

Without the horizontal drive pulse the high voltage generated by the flyback will collapsed and protect the user from excessive x-ray.

The flyback transformer pinout will also generate high pulse ac which later convert to dc through an ultra fast recovery diode. For your information, the ac pulse generated by the flyback transformer cannot be check with our normal analog or digital meter. the frequency is so high and you need a special meter to do the job. The dc voltages are then supply to various circuit such as the vertical output circuit. If you  understand all the functions of each flyback transformer pinout, repairing  monitor or tv will be much easier and save your precious time.

 TV / MONITOR  Fly-Back Transformer Replacement GUIDE:

All repairers with  experience, once made a replacement of a driver transformer with more or less fortune. All we did was to methodize the work and modify the circuit to work optimally.

But....... when it comes to a fly-back Transformer , practically all repairers think that if the replacement is not the exact fly-back  Transformer, absolutely nothing can be done. In principle we would like to clarify that manufacturers of replacement fly-backs do not manufacture all fly-back Transformer variants; they only manufacture some of them and then connect the bases according to the different models and mark them with a different code. ANYWAY SPECIFICITY IS OEM RELATED BY DESIGN.

EXAMPLE:Between different 20" fly-backs Transformer , for example, there are usually minimal differences except in the position of the legs. If there are notable differences, it is in the high voltage because this varies according to the size of the screen. The 14" tubes usually have extra high tensions of 18 to 20 KV; the 20" tubes between 23 and 25 KV and finally the 29 and 33" tubes have tensions higher than 28 KV / 36KV. In addition, the larger tubes have a different horizontal output circuit that has an east/west modulator to correct the pad effect plus other specific parts.

Let's limit our analysis to 14 and 20" TVs from which the fly-back Transformer is not achieved. The first step is to know a fly-back inside to understand the replacement work. Let's analyze the returns and live of the auxiliary windings.
CHECK schematic diagram and study it.

A modern fly-back Transformer is a hybrid of a high and low voltage transformer and a screen voltage and focus adjustment circuit. It can be divided for analysis into a transformer and a focus pack.

NOTE:  fly-back Transformer IS SPECIFIC TO TV / MONITOR CHASSIS BY DESIGN, TAKE ALWAYS ORIGINAL OEM OR ORIGINAL MATCHED REPLACEMENTS.

Transformer analysis:

The transformer is fundamental part of the horizontal output circuit because it connects the source to the collector of the horizontal output transistor through an inductance about 4 times greater than that of the yoke. In this way, only 1.5 to 1.7 A of the 6 or 7 A peak-to-peak current through the yoke flows through the fly-back and the horizontal source capacitor. Be aware that in older tvs which may  have greater deflection systems the currents are higher.

But the fly-back is not an inductor, it is a transformer and part of the energy existing in its primary is transformed into several low voltage windings, which feed different stages of the TV such as the jungle, the vertical output, the video stage , the sound, key voltages for chroma, sync, and many others services depending on design, and above all the tube filament (which is not rectified but applied as AC). These windings are strongly coupled to the primary because they are built above or below it.

The geometry of the fly-back core is very particular because it is a transformer that has a high voltage winding and the turns of that winding must be away from the core. Therefore, the classic shape of the core with an "E" and "I" shape is abandoned and a shape with two "U"'s is used where the HV winding enters loosely. The spool of that winding has a slotted shape, where only the diameter of a wire enters. In this way the winding is really a wire spiral and in reality it is not one single winding but 4 or many more , each one with its corresponding high voltage diode and its filtering capacitor, also of high voltage. This winding, because of its shape, is loosely coupled to the primary so that a fault in it, is not transferred as a short circuit but as a reduction of primary inductance but it will produce a malfunction.

As we know, the return of the high voltage winding is not connected to ground, but to the horizontal source. A 20" tube supports only a maximum current for each cathode of 330 uA; between the three cathodes they can consume a maximum of 1 mA and that current is directed from the cathodes to the aluminizing of the screen that is part of the final anode of the tube. This current returns through the winding and produces a voltage drop in a network
Synthetically, if the image is black there is no current and the voltage of ABL  When the brightness increases, the voltage increases  so that when 1 mA circulates, the voltage   is cancelled and there operates the jungle / luminance matrix stages limiting the brightness and contrast.

Analysis of the focus / G2 VOLT pack inside  DST Transformer

Flyback deflection systems are well known and widely used in television receivers. In such systems, a deflection voltage source drives an autotransformer with a ramp shaped current for deflecting an electron beam across the phosphor coated faceplate of a cathode ray tube (CRT). At the end of the ramp waveform, a relatively large retrace pulse is developed. This pulse is magnified by the turns of the flyback transformer winding and rectified to develop the high DC voltage required to operate the CRT. As is well known, although the high voltage system is tuned, the high DC voltage produced varies substantially with system loading that occurs due to increases in the electron beam current of the CRT. There have been numerous circuits in the art for "stiffening" the high voltage supply. In many applications, a separate, non-deflection-based high voltage system is used because of its tighter tolerance on regulation.

With the growing use of computer monitors, the need for precision CRT displays has increased. In these uses, high voltage regulation is critical and needs to be closely controlled to prevent unacceptable raster distortion and size changes. On the other hand, the needs of the marketplace are such that the cost of the monitor must be maintained as low as possible.

The focus pack has several functions: it is a double variable voltage attenuator also known as HV Bleeder. The highest voltage is for the focus and the lowest for the screen. The older tubes are low focus and the focus pack delivers voltages of approximately 8 KV. The newer and bigger ones are high focus and deliver about 9.5 KV. It is not possible to change a low-focus fly-back for a high-focus one, because it does not adjust the focus.

Generally, the conventional bleeder resistor is manufactured in the following manner. , there is prepared a ceramic substrate  made of Al2 O3 having a purity of about 96%. Its thickness is about 0.5-1.2 mm, and its area is 400-1500 mm2. Upon the ceramic substrate , there is printed PbAg, PtAg, Ag or their combination paste. Then the printed substrate is baked at a temperature of about 800° C., and thus, a printed circuit board is formed, and then lead wires are soldered. Then RuO2 is printed thereupon, and then the structure is baked at a temperature of about 850° C. Thus a resistor having a certain thickness is completed.

Meanwhile, in this resistor, electric current can flow only if the electrical resistance per unit length of the resistor is smaller than the air contact electrical resistivity. In the case where the voltage breakdown resistivity of air is 0.5 KV/mm, if a voltage of 20 KV is supplied across a resistor 12, there has to be secured a distance of 20 KV÷0.5 KV/mm=40 mm. Further, if the thermal degradation and the environmental factors are taken into account, then the safe distance must be 1.8 times as large as the above distance, that is, 40 mm×1.8=72 mm. Meanwhile, in the case where the resistor 12 is printed on the ceramic substrate 10 in a straight line, the length of the ceramic substrate has to be longer, with the result that the total bulk of the ceramic substrate becomes too large.

The screen voltage is approximately the same for all tubes (in the order of 250 to 350V or 500 to 800V). Both voltages are provided by voltage dividers and high value potentiometers because they are directed to grids in the tube that do not consume current. As you can see, the circuit is simply a series of two high voltage potentiometers and two high voltage resistors connected between the pacifier output and ground. In figure above I draw the focus pack circuit only with the characteristic voltages and resistances, which are practically the same (or at least proportional) for all the equipment.


The resistance values are high enough that it is impossible to measure them with a digital or analog tester. It is even impossible to measure the voltages at the focus and screen outputs without altering their value. And they're prone to defects such rising in values or dropping value.

Now that we know the circuit let's start with the replacement work. As the fly-back has two sections we must analyze the failures of both sections separately starting with the fly-backs that have problems in the focus pack.

The most common fault is a dark screen despite the existence of high voltage. A high voltage tip should really be used for the tester if we want to be sure of the existence of the 25KV of AT but generally the test of measuring the screen voltage with the potentiometer at maximum is usually enough to verify that there is high voltage.

The ideal is to use the focus pack of a disused fly-back  Transformer set on a 20" TV that works well to indicate 250V on the screen output by adjusting the potentiometer. Without much error you can interpret that this test TV is 25 KV and already has a high voltage attenuator set that you must connect to the pacifier of the TV under test with an alligator clip that will be covered by the pacifier so that no arcs are produced.

If there is good high voltage and the screen is dark the problem may not be in the fly-back  Transformer. The most basic thing is to see if the tube filament is on and measure the screen voltage if you have not already measured it. If both things are OK, you should measure the focus voltage, with a high voltage tip that has a resistance greater than 200 MOhms.

The measurement with instruments is not dangerous for the circuit, because the focus source is of high impedance. 

At the time when indicated to connect the three cathodes to earth briefly  with resistors of 150KOhms and to return to test if the screen illuminates the problem is in the video card or the jungle.

But if the problem is in the focus pack you don't need to change the whole fly back. Transformer In specialized stores they sell focus packs ready to be connected to the pacifier that generate the focus and screen voltage. Cut the cables of the damaged focus pack, connect the new ones and test. You can also use a fly-back that has a damaged winding. This case is specific with external HT bleeders where the focus voltage is obtained from.


  If the problem is in the winding section of the fly-back Transformer  the first thing to do is to check the operation of the stage with the simulated fly-back instrument. Connect it replacing the primary and measure the collector oscillogram with low source voltage (for example 10% of the nominal value); if you do not have an oscilloscope, try it with the horizontal output detector (a RF detector probe) which can be lowered free of charge from and if the delay voltage has a normal value of about 80V, pass gradually to higher source values until the nominal value is reached.
    If everything is normal, try connecting only the primary of the fly-back Transformer supposedly damaged. This means that you must disconnect all the auxiliary diodes, including the HV pacifier, and try again, starting with a source voltage of 10% of the nominal value, until you reach 100%. If everything is OK, the problem is not in the fly-back Transformer but in some of the auxiliary circuits. Connect the auxiliary diodes one by one and always perform the same test starting from 10% of the source voltage until the damaged auxiliary circuit is discovered. Note: Although unlikely, consider that there may be more than one damaged auxiliary circuit. 

TAKE NOTE THAT THE'RE MAY A SPECIFIC PROTECTIVE TV CIRCUIT THAT WILL STOP THE HORIZONTAL OUTPUT IF IT IS NOT WORKING PROPERLY AND ALSO SOME  TV POWER SUPPLY VOLTAGE MAY NOT WORK PROPERLY IF THE HORIZONTAL OUTPUT IS NOT WORKING PROPERLY DUE TO A FLY-BACK TRANSFORMER WHICH MAY BE DEFECTIVE.

AS EXAMPLE:

In a typical switch mode power supply (SMPS) of a television receiver the AC mains supply voltage is coupled, for example, directly, and without using transformer coupling, to a bridge rectifier. An unregulated direct current (DC) input supply voltage is produced that is, for example, referenced to a common conductor, referred to as "hot" ground, and that is conductively isolated from the cold ground conductor. A pulse width modulator controls the duty cycle of a chopper transistor switch that applies the unregulated supply voltage across a primary winding of an isolating flyback transformer. A flyback voltage at a frequency that is determined by the modulator is developed at a secondary winding of the transformer and is rectified to produce a DC output supply voltage such as a voltage B+ that energizes a horizontal deflection circuit of the television receiver. The primary winding of the flyback transformer is, for example, conductively coupled to the hot ground conductor. The secondary winding of the flyback transformer and voltage B+ may be conductively isolated from the hot ground conductor by the hot-cold barrier formed by the transformer.

It may be desirable to synchronize the operation of the chopper transistor to horizontal scanning frequency for preventing the occurrence of an objectionable visual pattern in an image displayed in a display of the television receiver.

It may be further desirable to couple a horizontal synchronizing signal that is referenced to the cold ground to the pulse-width modulator that is referenced to the hot ground such that isolation is maintained.

A synchronized switch mode power supply, embodying an aspect of the invention, includes a transformer having first and second windings. A first switching arrangement is coupled to the first winding for generating a first switching current in the first winding to periodically energize the second winding. A source of a synchronizing input signal at a frequency that is related to a deflection frequency is provided. A second switching arrangement responsive to the input signal and coupled to the second winding periodically applies a low impedance across the energized second winding that by transformer action produces a substantial increase in the first switching current. A periodic first control signal is generated. The increase in the first switching current is sensed to synchronize the first control signal to the input signal. An output supply voltage is generated from an input supply voltage in accordance with the first control signal.

But if everything indicates that the problem is in the fly-back Transformer and the fly-back is not achieved, then we must find a fly-back Transformer as similar as possible (better original)  to ours and perform a very simple test. Make a 2 or 3 turns winding in any open place of the core by connecting one end of the winding to ground. If you have an oscilloscope, connect it over the added winding to raise the oscillogram; otherwise, connect the rewind pulse detector indicated above to a tip of the winding and then invert it to find both the positive and negative value of the signal. Connect only the primary of the new fly-back and run it at the nominal voltage.

 The oscillogram obtained will be similar to the one in figure: 

The oscillogram could appear inverted since we made our coil with any direction. If it appears inverted, change the ground connection to live. The most important thing is that you measure the peak pulse value of the signal, which in our case is 23.8V. If this voltage corresponds to three turns, calculate the value of voltage per turn as 23.8/3 = 7.9 V/turn.

If you don't have an oscilloscope, you can use the audio probe for the tester (A RF detector probe)  that will indicate directly the  value of the signal or make the double measurement with the delay detector.

Now we have to start modifying the auxiliary voltages of our substitute fly-back  Transformer if necessary. Let's start with the filament voltage. Observe the circuit of the substitute fly-back to find the ground leg and connect it to ground. Now measure the other auxiliary legs and note the peak to peak values. The filament should have a  peak pulse voltage of about 22 or 23 V. Do not try to measure the RMS voltage with a common tester or with the peak value probe. None of the classic instruments will show a peak pulse value of 6.3V. It is best to calculate the RMS value as a function of the peak-to-peak value for a delay time of 12 uS, which is what we did to indicate the correct peak value of 22.5V.

It is very likely that by changing the number of turns you will not be able to achieve the exact value. In that case you should calculate the excess turns and then adjust the resistor  value to get 22.5V on the filament. In our case you can test the voltage value of the filament winding and if it is close to the indicated one modify the value of resistor .

Is it very important that this voltage value is accurate? Yes, but a fluctuation of 1V cannot shorten the life of the tube but it's better avoided. The filament of a tube is far from the melting point, i.e. it is undervolted to increase the life to a value far above the cathode depletion but also better avoided.

Adjusting a Running Auxiliary Voltage

Let's suppose that the winding for the vertical voltage has to give 25V and gives 18. We measure that our fly-back has 7.9 V peaks per turn. For a delay time like the one indicated, the relationship between the positive semicircle and the peak value taken from the oscillogram in figure 30.4.3 is 3,07/23,8=0,13. This means that each turn adds a voltage of 3.67V to the rectified voltage and that to go from 18 to 25 you have to add approximately two turns (7.34V+18 = 25.34V). Without an oscilloscope, I have to add the two turns  and measure a voltage of 3.67/0.13= 28.2V with the peak probe. Now, I must cut the printed circuit and connect from the fly-back leg a wire that must pass twice inside the core and solder it to the cut track on the side of the diode.

Note: the direction of the winding is impossible to determine a priori, the most advisable thing to do is to choose any and measure if the voltage has the correct value. If not, the winding or connections must be reversed.

In this way all windings must be corrected, so that the fly-back is ready to perform a final test with everything connected.

But the auxiliary voltages are not all that differentiate one fly-back from another. In the next delivery we will explain how to perform the final test without burning anything in the attempt, and that should be changed if the width is not correct.